console - fix service publishing mandatory fields for orgs

[RemiDesgrange]

Now web service that return the mandatory fields for orgs
(/public/requiredFields) depends on the Validation object. Which can be
overrided by properties.

[landryb]

Cant test it at runtime right now but that seems to make sense - @Gaetanbrl can you check it fixes #2666 for you ?

[Gaetanbrl]

Cant test it at runtime right now but that seems to make sense - @Gaetanbrl can you check it fixes #2666 for you ?

I could check it now.

[Gaetanbrl]

LGTM with this tests:

• orgType not mandatory -> OK for this PR.
  I could create org without orgType but this action create an error as explain in console - error on org creation without businessCategory #2666.

Values from console.properties :

requiredFields= firstName,surname,org

• orgType mandatory -> OK.
  Could not validate form without orgType.
  requiredFields=firstName,surname,org, orgType

Values from console.properties :

requiredFields= firstName,surname,org,orgType

[Gaetanbrl]

@RemiDesgrange could you just change the name / title of this PR ? Thanks.